Abstract: A directional microphone of the interference type comprising a single elongated tube having one or more longitudinal slots or side apertures therein, at least one electroacoustic transducer provided at one end of the tube and an acoustic reflector assembly provided at an opposite free end zone of the tube, by which, preferably, sound waves of the upper audio frequency range are concentrated toward the sound inlet of the interference tube at the opposite free end zone thereof. A directional microphone which is easy to handle and unites the advantages of an interference microphone with that of a reflector microphone is thus obtained.